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© 2018 Littelfuse Fresh Water Pumping
Littelfuse.com/Pump-Protection
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Single-Phase Pump Protection
Programmable and Low-Range Programmable
77C-KW/HP / 77C-LR-KW/HP
Input Characteristics
Supply Voltage
100-240VAC
Frequency
50/60Hz
Motor Full Load Amp Range
77C-KW/HP
2-25 Amps (Loops Required); 26-90 Amps
(Direct); 91-800 Amps (External CTs)
77C-LR-KW/HP
1-2 Amps (1 Loop Required); 2.1-9 Amps (Direct)
Output Characteristics
Output Contact Rating-SPDT
(Form C)
480VAC @ 240VAC (Pilot Duty)
10A@240VAC (General Purpose)
Expected Life:
Mechanical
1 x 10
6
operations
Electrical
1 x 10
5
operations at rated load
General Characteristics
Operating Temperature
Ambient Operating
-20º to 70º C (-4º to 158º F)
Ambient Storage
-40º to 80º C (-40º to 176º F)
Accuracy
Voltage
+/- 1%
Current
+/- 3% (Direct, No External CTs)
Timing
5% +/- 1 second
Power
+/- 10%
Repeatability
Voltage
+/- 0.5% of nominal voltage
Current
+/- 1% (Direct, No External CTs)
Maximum Input Power
10 W
Pollution Degree
3
Class of Protection
IP20, NEMA 1 (finger safe)
Relative Humidity
10-95%, non-condensing per IEC 68-2-3
Safety Marks
UL
UL508, UL1053
CE
IEC 60947-1, IEC 60947-5-1
CSA
C22.2 No. 14
Dimensions H
77.47 mm (3.05”);
W
97.79 mm (3.85”);
D
128.27 mm (5.05”)
Maximum conductor
size through holes
0.65” (with insulation)
Weight
1.2 lbs.
Mounting Methods
35mm DIN rail or surface mount
Dimensions
3.100" (78.74)
3.850" (97.79)
3.600" (91.44)
2.280"
(67.31)
3.050"
3.850" (97.79)
3.600" (91.44)
5.050"
4.700"
1.200"
(57.91)
2.650"
(77.47)
(30.48)
(128.27)
(119.38)
D. 0.650" (16.51)
0.200" (5.08)
OPTIONAL LOOP HOLES
MAIN CONDUCTOR PASS HOLES
A
B
C
